Shortly after the sun went down, Of Montreal set off an electro-pop dance party at Rothbury. With many in the crowd decked out like it was a mid-Nineties rave (glow sticks and neon necklaces abounded) Kevin Barnes and Co. worked through a shimmering “Faberge Falls For Shuggie” and a the loose disco-funk of “Suffer for Fashion.” The band seemed to take the latter song literally, dressing like castoffs from a 1980s discotheque. Barnes, for one, sported a bright orange scarf, blue boots, white jeans and a matching headband. And while some of the frontman’s lyrics bordered on bizarre (“Be careful how you touch me/My body is an earthquake,” he howled at one point), the performance dove head-on into Fellini-esque surrealism, with masked characters stalking the frontman as he worked the stage.